The eye twitch

I am now on day 7 of a persistent eye twitch.  It's probably caused by stress, though the optometrist says that there isn't much data on what actually causes the buggers.  I'm thinking that lots of long days and nights at the office staring down student handwriting has something to do with it.  My nose now sports new glasses (time for an upgrade, anyway) and I'm trying to read less, though I'm not having much success on that front.

How long have eye twitches lasted for y'all out there?  Any record holders, or am I setting a new record?